Well, I've just done the whole system drain episode in association with my new radiator install, and I really like what David came up with, so....
I found some stainless steel 1/4" NPT couplers at the hardware store, about $3 each. And some SS plugs.
A local machine shop cut the couplers in half, then milled them down to the proper pipe o.d. radius (for a tight fit on the outside of the pipe) and then TIG'd them over 1/2" holes.
Total cost under $50.
Any future system drains will be much easier.
Thanks for the idea David!
Larry
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